前后端分离项目,支持跨域,session不丢失

时间:2025-03-15 20:32:00

    在调试一个前后端分离的项目,发现登录成功后已经把信息保存到session中了,再从session中取得当前用户信息的时候发现取不到,debug发现sessionId已经变了,自己网上查了很多资料,并不准确,

把自己的解决分享给大家:

后端拦截器:

//拦截器添加跨域支持(如果是配置拦截器,请将@component删除)
//@Component
public class CORSFilter implements Filter {


    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        ("Access-Control-Allow-Origin", ("Origin"));
        ("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
        ("Access-Control-Max-Age", "3600");
        ("Access-Control-Allow-Headers", "x-requested-with");
        ("Access-Control-Allow-Credentials","true"); //是否支持cookie跨域
        (servletRequest, servletResponse);

    }

    @Override
    public void destroy() {

    }
}

关键点:

 ("Access-Control-Allow-Origin", ("Origin"));

 ("Access-Control-Allow-Credentials","true"); //是否支持cookie跨域


前段代码:

request: function(param) {
    var _this = this;
    $.ajax({
       xhrFields: {
           withCredentials: true
       },
        type:  || 'get',
        url:  || '',
        dataType:  || 'json',
        data:  || '',
        success: function(res) {
            console.log("网络请求结果:"+res.toString());
            //请求成功
           

        },
        error: function(err) {
            typeof  === 'function' && (err.statusText);
        }
    });
},
关键点:

    在ajax请求中增加

      xhrFields: {
           withCredentials: true
       },

经过上面的配置,完美的解决了我的问题!如果有疑问可以给我留言。